Screw-jack locomotive-hoist.



"Vf-YW@ C.A.HARDY.

SCREW JACK LOCOMOTIVE HOIST. APPLICATION FILED APILzsplsls.

Patend Feb. 3, 1914.

4 SHEETS-SHEET 1.

Patented Feb. 3, 1914.

C. A. HARDY.

Nvm.

SCREW JACK LOCOMOTIVE HOIST APPLIUATION FILED APn'.2,41913.

C.A.HARDY. SCREW JACK LOCOMOTIVE HOIST. APPLICATION FILED APR.28, 1913.

Patented Feb. 3, 1914;.

4 SHBBTS-SHEET 3.

l C.A.HARDY. SCREW JACK LOGOMOTIVE' HOIST. APPLIoATIoN FILED APR. za,191e.

Patented Feb. 3, 1914.

bars 12' vand 14 are-carricd` by screws 26 guided in uprights which aremounted upon truck frames 32, one located at each side of the main trackrails 10. Each of the two outer truck frames 32 is supported upon Thisclutch jaw 62 is movable into and out a suitable set of wheels orrollers 3-1 movable along supplemental track rails-"3G provided for thepurpose, as shown, parallel to the main track rails l0. By the use ofthese supplemental track rails the bars 12-and 14 may, wheneverlifted'high enough to clear the rails 10, be moved longitudinally ofsaid track rails 10 so as tojlongitudinally adjust the lifting bars toproper application to the locomotive body 38, one of whose many possibleforms is suggested in dotted--lines in the upper portion of Fig. 2.

The trucks and lifting devices may, if desired, be made exactly asshown," described and claimed in the patent application of Fred A.Bundle for screw jack locomotive hoists, Serial Number 665,682, filedDecember l1, 1911, wherein means is provided for selectively applyingpower for operating the lifting mechanism or moving the truck by poweralong their respective tracks. ln the device here shown in the drawings,the trucks 32 are movable along their respective tracks 3G by the use oflevers 40 operating ratchet devices 42 carried `by the shaft 46. Anymethod of moving the trucks along these tracks maybe used withoutdeparting from this invention.

Mounted in any sort of suitable bearing 48 on opposite sides of thetrack 10 are two parallel rotatable .shafts 50 driven by any suitablesource ofpower -at equal speeds. In the particular case here illustratedthese shafts are driven by a. motor 52 which operates them through thetwo sets of bevel gearing 53 and connected together bythe shaft 55 whichis located 'below the rails 10 so as to be out of the way of a passingloconotive.

At the base of eachone of thevertical screws 2G is a worm wheel 56rigidly connected to the screw 26 by any suitable means and meshing withaworm 58, journaled upon the adjacent shaft 50, and carrying at its endany suitable clutch jaw G0.j Meshable with this jaw is a clutch member62 sl idably but non-rotatabl y mounted upon the shaft 50 by any of the.well known methods.

of mesh with jaw bythe operation of a h and lever (5l pivoted upon anysuitable support, as for instance 6G, a: :l carrying a pin (3S which'enters an annular notch 70 in the aw G2 so that moving the lever Gitwill move the clutch jaw back and forth along the shaft withoutinterfering with the rotation of the clutch men'iber by the shaft.

From the description, of theA foregoing parts, which are all well knownin the art, it is obvious that the operator may, by operatliftingposition for ing a particular lever 64 to throw its. particular `clutchjaw G2 into or out of'mesh with the jaw G0, as the case may be, stop orstart the rotation o f the particularscrew 26 whichfis in" operationwith that particular clutch jaw (30 with which the'operator is working.`'As `all six of the lifting screws 26 Vare provided with the mechanismjust described,` it is obvious that by having two operators, one on eachside of the track, manipulate the levers 64 of a particular lifting bar,as for instance 12, the bar and the load upon it may be moved-.up anddown` at the will of the operator independently of the other bars 13 and14:. It is also obvious that by having an operator at each of thev sixlevers 64 simultaneously and correspondingly operate said six levers',all three of the bars 12, 13 and 14 may be simultaneously movedinueit-her direction depending upon the rotation of shafts 50, or brought to rest as the commanding workman may direct.v

The same result may also'be secured by having and shaft, then throw inall the clutches one after the other and the-n start the motor again inthe desired direction.

In order to do away with objectionable springing in the end portions ofthe shafts 50 adjacent to the trucks 32, a supplemental support 7 2mounted upon Wheels 74 movable along the adjacent tracks 86 isprovided.-

single operator first stop' the motorA The particular shaft section 50to which.

these devices are applied rotates freely in the upper portion of thesupport 72 and the support may be moved along the track 36 to a positionwhere it is .midway between the adjacent truck 32 and the next adjacentstationary support 48. l y K Thetrucks 32 and supports 72 may beconnected by chains, rods or links as suggested in the upper lefthandcorner of Fig. 1 so .that they move `more or less in unison asdesired; j

It will be noticed that the middle lifting bar 1 3 is carried from astationary support. thereby doing away with the expense 'of trucks atopposite ends of the bar and what is more important, tending to steadythe entire mechanism during the operation of-raising a ,locomotive thuspreventing longitudinal movementjof the locomotive and. any of thelifting parts after the lifting operation has actually begun.

In the operation of the entire device, the various lifting bars aremoved in the man'- ner described either'independently or simultracks 10.The locomotive to be lifted is now moved along the track rails 10 untilits central body portion 38 is directly over the central lifting bar 13.The operators now independently o r in combination raise each of theliftingbars 12 and 14 so that they are above and clear of the trackrails 10 but are not yet high enough to Contact with the end bodyport-ions 38 of the locomotive. They then by use of ratchet levers 40move theV lifting bars 12 and 14, which are up to this time outside theends of the locomotive, along the tracks to positions where therespective bars register with suitable body portions of the locomotive`to bc lifted. The operators then 'either independently orsimultaneously move these respective bars 12 and 14 upward until theyare in lifting contact with their respective vbody portions of thelocomotive. Then proper adjustment of the supports is made whereupon allof the levers 64 are thrown to 4lifting position land as the" differentsections of the shafts 5,0 rotate simultaneously all parts of thelocomotive are simultaneously lifted at'the same rate of speed, therebyreducing the st-rain upon it to the lowest point. vWhen the loco 4motivehas reached the proper position the motor 52 is stopped therebysustaining the locomotive in lthat position and the wheels may be rolledaway. When it is desired to lower the locomotive, motor 52, is operatedin the reverse direction unt-il the locomotive rests upon the rails 10,whereupon the manipulations heretofore described are re. versed toreturn the various liftingbars to their normal position with their-railsections 18- in register with the adjacent portions of the trackwhereupon the locomotive may move along the track rails 10 off from andclear of the parts which have been heretoi foredescribed. The trucks onwhich the locomotive is thus moved away may be its regular ones or onlytemporary ones.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is 1# 1. lin a device of the class describedthe combination with a trackv for an object to be lifted, three liftingdevicesalong the track, one located on stationary supports between theother two, the latter two being movable along'the tracks toward -or fromthe central lifting'A device, and means for then simultaneouslyoperating all of the three lifting devices at the same rate of speed.

2. ln a device'of ,the class described, in, combination with a tirackfor-an object to be lifted, a lifting ,device mounted upon a stationarysupport near the center of a length of the track, two other lift-ingdevices on opposite sides of the first lifting device and near the endof said track length movable toward and from the central lifting device,and a power shaft adapted to then simultaneously operate all of saidlifting devices 'at the same rate of speed.

In a device of the class described,a' portion of track on which anobject to be lifted may rest, a lifting bar'near the center of saidtrack vertically operable to lift the center of the objecttto be liftedand carried upon stationary fixed supports outside the track, twootherlliftingbars, one near each end of said track operable to lift therespective ends of the object upon saidtrack carried upon truck devicesoutside the track movable parallel tosaid track to adjust the positionof said end lifting bars with reference to the length of the objectwhich is to -be lifted, and power means adapted, when/the variouslifting bars have been adjusted longitudinally of the track tosimultaneously and correspondingly loperate all three lifting bars, forthe purposes set forth.

f 4. In combination with a pair of track rails, a' lifting bar extendingacross said rails .and movable vertically through openings in said railsfroma position below to a position above said rails and vice versa, railmembers carried by the bar adapted, when the bar is in one position, toclose the spaces in said rails through which the bars move so as topermit the passage ofan object to be lifted by said' bar along saidrails, means for lifting said bar located along said bar outside theplanes of said rails and means for trans- .lifted by said bar.along saidrails, a truck supporting said lifting means movable when the bar islifted abo-ve the rail longitudinally of said track rails, and` meansloperable at will in any position of the truck for lifting said bar.

6. In a device of the class described, a portion cfa track on which anobject to be lifted may rest, three lifting bars of greater length thanthe width of the track extending across the track in recesses whichnormally permit their lying below the track and clear of an object to'bc lifted passing on sa-id track, rail devices carried by saidlifting.. bars registering with openings in the track formed to permitthe lifting bars moving from said normal position to a position whereinsaid bars are above and clear of the tracks and vthus in said normalposit-ion making the tracks contiiiuous, a support for the opposite endsof the central bar, a sup porting device for the opposite ends of cach4, l massifs@ toward and from the central bur, lifting I I n witnesswhereof, I have hereunto subdevices for said bars earned by therespecscmbed my name in the presence of two W- tive supporting devices,and means operable messes.

at the will 'of an operator adapted to inde- CLEMENT A. HARDY. 5pendently or simultaneously and corre- Witnesses:

spondinglyoperate said lifting devices, all G. R. BRANDON,

for the purposes set forth. l DWIGHT B. CHEEVER.

opiex o1' thin patent may be qbtaine for tive cents enen, by addressingthe Commissioner of Patente,

Washington, E.

